/Engine/Source/Runtime/ClothingSystemRuntimeCommon/Public/ClothingAsset.h
Callback envoked after weights have been edited. CallsPushWeightsToMesh()_ on eachClothLodData_, and invalidates cached data. Optionaly recalculate the owner's sections fixed vertex data based on this asset masks, and invalidate the DDC for this asset.
void ApplyParameterMasks ( bool bUpdateFixedVertData, bool bInvalidateDerivedDataCache )